Phi Gamma Delta, commonly known as Fiji, is a North American social fraternity. The organization was founded in 1848, at Jefferson College in Canonsburg, Pennsylvania.

Initially, chapters of the fraternity were named in the order of the Greek alphabet; the first chapter was designated the Alpha chapter, the second the Beta chapter, and so on. Once the list was exhausted, the second order of chapters had the suffix "Deuteron" to denote this; for example, Alpha Deuteron, followed by Beta Deuteron, and so on. Starting in the late 1880s, the fraternity chapter designations were often references to the local chapters that the fraternity absorbed; for example, the Zeta Phi chapter at William Jewell College is named for the local group which used the name before it was absorbed by the national fraternity. All provisional chapters of the fraternity are referred to as Delta Provisional Chapter before their official chartering.

The modern naming scheme is that a chapter's Greek letters are adapted from the initials of the university's home city or institutional name. For example, the Kappa Tau chapter at the University of Tennessee derives its name from the city of Knoxville, Tennessee, the location of the university, and the Upsilon Alpha chapter at the University of Arizona derives its name directly from the university name itself.

In the fraternity's early days, chapter designations were often reused from closed chapters or chapters at closed or merged institutions. One such example is the Delta chapter at Bucknell University, founded in 1882, the second chapter to use the name; the chapter at Union University formerly used the name before the chapter's closure in 1862. If two institutions merge that both have fraternity chapters, one of the chapter designations will be retired in favor of a single name. This has only happened once in the fraternity's history, when Jefferson College and Washington University merged to form Washington & Jefferson College; the Beta chapter at Washington was retired to consolidate under the Alpha chapter name in use at Jefferson.

Undergraduate chapters In the following Phi Gamma Delta undergraduate chapter list, active chapters are indicated in bold and inactive chapters and institutions in italics.

ChapterCharter date and rangeInstitutionCityState or provinceStatusAlpha – 1869;September 19, 1873 – November 2018Washington & Jefferson CollegeWashingtonPAColonyBeta Prime – 1865Washington UniversityWashingtonPAMergedGamma Prime – 1851Nashville University NashvilleTNInactive, ReassignedDelta Prime – April 1961;June 10, 1870 – c. 1873Union UniversityMurfreesboroTNInactiveEpsilon – 1852;1859–1861;October 31, 1887 – 1898;1926University of North Carolina at Chapel HillChapel HillNCActiveZeta–1853Maryville CollegeMaryvilleTNInactiveEta – 1857;September 30, 1879 – 1897Marietta CollegeMariettaOHInactiveTheta – 1859;November 22, 1875 – December 1877;June 3, 1901University of AlabamaTuscaloosaALActive – 1868University of MississippiOxfordMSInactiveIota Prime – 1856Centre CollegeDanvilleKYInactiveKappa(See also Chi Prime)–1861;June 13, 1881 – 1886;January 28, 1978Baylor UniversityWacoTXActiveLambda – November 1856;June 8, 1857DePauw UniversityGreencastleINActiveMu Prime – 1861Howard CollegeHomewoodALInactiveNu – 1861;November 14, 1865 – 1879;November 26, 1881 – October 27, 1883;October 1887 – September 14, 1912Bethel CollegeRussellvilleKYInactiveXi – 2020;March 2, 2024Gettysburg CollegeGettysburgPAActiveXi chapterOmicron – 1860;1867–1882;1889–1894;1897 – August 11, 1998;February 14, 2004 – June 2022University of VirginiaCharlottesvilleVAInactivePi – August 1, 1998;October 4, 2014Allegheny CollegeMeadvillePAActiveRho – 1862Transylvania UniversityHarrodsburgKYInactive – 1866Soule UniversityChappell HillTXInactiveSigma Prime (see Pi Sigma) – October 26, 1872University of Western PennsylvaniaPittsburghPAInactiveTau – May 20, 2000;May 13, 2006Hanover CollegeHanoverINActiveUpsilon – July 26, 1906College of the City of New YorkNew York CityNYInactivePhi Prime – February 28, 1870Baker UniversityBaldwin CityKSInactive, ReassignedChi Prime(See also Kappa)1866 – 1869Waco College WacoTXInactivePsi – 1873;1882–1999;2007Wabash CollegeCrawfordsvilleINActiveOmega – September 18, 1999;October 6, 2007Columbia UniversityNew York CityNYActiveAlpha DeuteronIllinois Wesleyan UniversityBloomingtonILActiveBeta Deuteron – June 8, 1905Roanoke CollegeSalemVAInactiveGamma Deuteron–1875;November 28, 1885Knox CollegeGalesburgILActiveDelta Deuteron (see Phi Second) – November 6, 1869Northwestern UniversityEvanstonILReestablished Epsilon Deuteron – October 26, 1894Muhlenberg CollegeAllentownPAInactiveZeta Deuteron – June, 1869;June 3, 1870 – 1878;October 7, 1890 - September 2025Washington and Lee UniversityLexingtonVAInactiveEta Deuteron–1879;April 23, 1994 – April 2001University of MississippiOxfordMSInactiveTheta Deuteron – February 22, 2008;2012Ohio Wesleyan UniversityDelawareOHActiveChi Second – 1878Monmouth CollegeMonmouthILInactiveIota Deuteron – 1878Cumberland UniversityLebanonTNInactivePhi Second (see Delta Deuteron) – October 26, 1872;January 1, 1931Northwestern UniversityEvanstonILActiveDelta Deuteron–1904;September 23, 1967Hampden-Sydney CollegeHampden SydneyVAActiveKappa Deuteron – 1874;April 26, 1884 – 1891;March 23, 1968University of GeorgiaAthensGAActiveZetaIndiana UniversityBloomingtonINActiveLambda Deuteron – 1874Thiel CollegeGreenvillePAInactiveMu Deuteron –1873;October 25, 1919 – September 1, 2005;October 6, 2012 University of IowaIowa CityIAActiveNu Deuteron – 18xx ?;November 27, 1888 – 1965Yale UniversityNew HavenCTInactiveXi Deuteron – 1879;1886–1899;1902–August 2004;May 12, 2007Case Western Reserve UniversityClevelandOHActiveOmicron Deuteron – November 24, 1997;March 5, 2005Ohio State UniversityColumbusOHActivePhi Third (see Phi Deuteron) – 1883University of MarylandBaltimoreMDReestablishedChi Third – 1887Racine College RacineWIInactiveIota Second – September 2, 1882;February 17, 1913 – 1965Williams CollegeWilliamstownMAInactiveBeta Second – 1883;December 18, 1890 – May 1999;April 10, 2010 University of PennsylvaniaPhiladelphiaPAActiveGamma Second (see Delta Xi) – 1885University of California, BerkeleyBerkeleyCAReestablishedPi DeuteronUniversity of KansasLawrenceKSActiveDelta Second – September 1, 2008;September 8, 2009 Bucknell UniversityLewisburgPAActiveRho Deuteron – February 1913College of WoosterWoosterOHInactiveSigma Deuteron – 2009Lafayette CollegeEastonPAInactiveTau Deuteron – 1887;September 6, 1901University of Texas at AustinAustinTXActiveSigma Second – November 2018Wittenberg UniversitySpringfieldOHInactiveLambda Deuteron – 2007Denison UniversityGranvilleOHInactiveAlpha Phi – Spring 1895;August 7, 1902 – January 21, 2000;November 6, 2004University of MichiganAnn ArborMIActiveBeta Chi – 2013Lehigh UniversityBethlehemPAInactiveZeta PhiWilliam Jewell CollegeLibertyMOActiveDelta Xi (see Gamma Second) – 1968;November 9, 1974 – July 30, 1993;February 1, 2003University of California, BerkeleyBerkeleyCAActiveTheta Psi – 1969;March 20, 1976 – 1989Colgate UniversityHamiltonNYInactiveGamma PhiPennsylvania State UniversityUniversity ParkPAActiveKappa Nu – 1989;1993–2020;2022Cornell UniversityIthacaNYActiveIota Mu – December 1894;May 23, 1899 – May 1998Massachusetts Institute of TechnologyCambridgeMAInactiveRho Chi – April 7, 2012;March 3, 2018University of RichmondRichmondVAActiveMu SigmaUniversity of MinnesotaMinneapolisMNActiveKappa Tau – 1893;November 1894 – May 14, 2012;20xx ? University of TennesseeKnoxvilleTNActiveBeta MuJohns Hopkins UniversityBaltimoreMDActivePi IotaWorcester Polytechnic InstituteWorcesterMAActiveLambda Sigma – 1895;1903–1971Stanford UniversityStanfordCAInactiveNu Epsilon – February 2018New York UniversityNew York CityNYInactiveTau Alpha – 1922Trinity CollegeHartfordCTInactiveMu Second – April 1995;April 4, 2009 University of Wisconsin–MadisonMadisonWIActiveAlpha Chi – 1962Amherst CollegeAmherstMAInactiveChi Fourth – May 2001;March 1, 2014 – 2017Union CollegeSchenectadyNYInactiveChi Iota – May 1998;April 28, 2007University of IllinoisChampaignILActiveLambda Nu – University of Nebraska–LincolnLincolnNEInactiveOmega MuUniversity of MaineOronoMEActiveChi Mu – July 3, 2006;November 5, 2011 – 2021University of MissouriColumbiaMOInactiveSigma TauUniversity of WashingtonSeattleWAActiveDelta Nu – 1965Dartmouth CollegeHanoverNHInactiveSigma Nu – 2021Syracuse UniversitySyracuseNYInactivePhi Gamma Delta – March 20, 1968Brown UniversityProvidenceRIInactiveChi UpsilonUniversity of ChicagoChicagoILActiveLambda IotaPurdue UniversityWest LafayetteINActiveAlpha IotaIowa State UniversityAmesIAActiveChi Sigma – 2006;March 10, 2012 – 2021Colorado CollegeColorado SpringsCOInactiveEpsilon Omicron – 1969;October 15, 1977 – July 29, 1998;2014University of OregonEugeneORActiveBeta Kappa – 1969;November 6, 1976 – April 22, 2005;2010–spring 2012;November 2, 2019University of Colorado BoulderBoulderCOActiveNu OmegaUniversity of OklahomaNormanOKActivePi Sigma (see Sigma Prime) – January 2, 1998;2017University of PittsburghPittsburghPAActiveNu Beta – Fall 2007;April 26, 2014Rutgers UniversityNew BrunswickNJActiveGamma SigmaSewanee: The University of the SouthSewaneeTNActiveMu IotaUniversity of IdahoMoscowIDActiveKappa OmicronOregon State UniversityCorvallisORActiveDelta KappaDavidson CollegeDavidsonNCActiveTau KappaUniversity of TorontoTorontoONActiveGamma TauGeorgia TechAtlantaGAActiveOmega Kappa – 1969Occidental CollegeLos AngelesCAInactivePi GammaUniversity of British ColumbiaVancouverBCActiveUpsilon Alpha – 2014;2017University of ArizonaTucsonAZActiveLambda Alpha – 1971;